Mastro is modern and easy to use. All the features are available from a single user-friendly interface. The chart you are working on is always visible, and it is interactive. Put your cursor over a planet to see its aspects. Drag and drop planets to move forward or backward in time, or use the clock feature to animate the chart. If you ever need help, we have extensive documentation and the best support team. Every feature in Mastro has been designed to be fully customizable. Mastro supports both tropical and sidereal astrology, as well as geocentric and heliocentric systems. You also have a choice between 3 Reference Planes, 4 Chart Styles, 14 House Systems, Customizable Orbs, Customizable Rulerships, and lots of appearance options. Mastro is available in English and in French.
Mastro is also the smartest astrology software ever, thanks to its exclusive expert system for birth, event, and synastry analysis. This groundbreaking system makes it easier than ever to interpret any chart by giving you a tree of keywords associated to documented astrological factors, sorted by a probabilistic index. Mastro was built with one goal in mind: unlock the full power of astrology to everyone, without making any compromise. We can proudly say that we've achieved that goal.